That's what i'm trying to figure out. It could be clogged lines because of the stuff in my gas tank.
After you find out what the PSI is. You also have to do a voume test assuming the PSI is correct. you'll have to get a manual for the specs. You should call your central library ask if they have automotive manuals. Mitchell Manuals are real good on info. Good Luck!!
Did you only change the fuel pump? Did you backflush the main pressure line?
If your pressure is low, I would suspect you can pinch the return line to check the pressure regulator. Also, when you pull the vacuum line from the regulator, if you find any fuel on that side of regulator, you are suffering from a torn diaphram.
If your pressure is still low after changing the pump and blocking the regulator return, I would suspect clogged fuel line. I could suggest a couple of ways to clean out the sediment, but they all involve flushing the line with flammable liquids;-). Or a really long pipe cleaner.
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